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US 5,509,842 AGranted
Method for pre-stressing CRT tension mask material
AssigneeRCA Thomson Licensing Corporation
InventorRichard W. Nosker
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for pre-stressing the CRT tension mask 24 to induce creep. The method includes the steps of applying a suitable force to the mask material to induce stress therein, heating the mask material to an ultimate temperature, for a sufficient time, while under stress, to induce creep, and cooling the material.
Claims10
A method for pre-stressing CRT tension mask material to induce creep, including the steps of
- a) applying a suitable force to said mask material to induce stress therein,
- b) heating said mask material to an ultimate temperature and for a sufficient time, while under stress, to induce creep, and
- c) cooling said mask material.
A method for pre-stressing a uniaxial tension mask, for use in a CRT, to induce creep at an elevated temperature, including the steps of
- a) applying a force to a mask, in said uniaxial direction, to induce stress in said uniaxial direction,
- b) heating said mask to a said elevated temperature, in excess of any processing temperature to which said CRT will be exposed during the manufacturing thereof, for a sufficient time, while under stress, to induce creep, and
- c) cooling said mask to room temperature.
Dependencies are inferred from the claim text.